Meet Shelli & Nathan

Shelli has spent years in the trenches of provider credentialing, working with medical groups of every size across all fifty states. She holds both the PESC and CPES certifications — credentials that, in a field where letters after your name reflect real tested expertise, mark her as one of the few specialists qualified to handle the most complex enrollment work end-to-end.

Her specialty experience spans some of the trickiest credentialing landscapes in healthcare: behavioral health groups navigating fragmented multi-payer panels, optometry and ophthalmology practices juggling vision and medical enrollments at the same time, and physical therapy clinics managing rapid expansion across multiple sites. Each of these specialties has its own quirks, its own quiet deadlines, and its own ways of going sideways — and Shelli knows all of them.

What sets her apart isn't just the certifications or the tenure. It's the relentlessness. Shelli outworks everyone in this industry. She catches the form fields others miss, follows up when others go silent, and refuses to let a file sit on someone else's desk. Combine that work ethic with sharp communication and an obsessive attention to detail, and you get the person you actually want handling the paperwork that determines whether your providers get paid.

Nathan brings something rare to a credentialing firm: a decade of experience working inside the insurance industry itself. A licensed health and life insurance broker since 2015, he has served more than 1,000 satisfied clients across numerous states — giving him an inside view of how payers actually think, how policies really work, and where the system tends to break down.

That insider perspective shows up most clearly in his appeals work. When insurance companies deny provider claims, Nathan steps in to fight back — and over 80% of the appeals he helps submit result in the denial being overturned. That track record isn't luck. It comes from knowing exactly which arguments insurers respond to, which deadlines to weaponize, and where their reasoning typically falls apart.

At The Credentialist, Nathan partners with Shelli on credentialing while leading the business, technology, and provider services side of the firm. He's the architect behind the systems and processes that let a small, focused team move faster than agencies five times their size.